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Properties

Label 80.3.b.a
Level $80$
Weight $3$
Character orbit 80.b
Analytic conductor $2.180$
Analytic rank $0$
Dimension $4$
CM no
Inner twists $2$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [80,3,Mod(31,80)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(80, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([1, 0, 0]))
 
N = Newforms(chi, 3, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("80.31");
 
S:= CuspForms(chi, 3);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 80 = 2^{4} \cdot 5 \)
Weight: \( k \) \(=\) \( 3 \)
Character orbit: \([\chi]\) \(=\) 80.b (of order \(2\), degree \(1\), minimal)

Newform invariants

comment: select newform
 
sage: f = N[0] # Warning: the index may be different
 
gp: f = lf[1] \\ Warning: the index may be different
 
Self dual: no
Analytic conductor: \(2.17984211488\)
Analytic rank: \(0\)
Dimension: \(4\)
Coefficient field: \(\Q(\sqrt{-3}, \sqrt{5})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{4} - x^{3} + 2x^{2} + x + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 2^{6} \)
Twist minimal: yes
Sato-Tate group: $\mathrm{SU}(2)[C_{2}]$

$q$-expansion

comment: q-expansion
 
sage: f.q_expansion() # note that sage often uses an isomorphic number field
 
gp: mfcoefs(f, 20)
 

Coefficients of the \(q\)-expansion are expressed in terms of a basis \(1,\beta_1,\beta_2,\beta_3\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + \beta_{2} q^{3} + \beta_1 q^{5} - \beta_{3} q^{7} + (6 \beta_1 - 9) q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + \beta_{2} q^{3} + \beta_1 q^{5} - \beta_{3} q^{7} + (6 \beta_1 - 9) q^{9} + 2 \beta_{2} q^{11} + ( - 6 \beta_1 + 4) q^{13} + ( - \beta_{3} - 2 \beta_{2}) q^{15} + 18 q^{17} + 4 \beta_{3} q^{19} + ( - 6 \beta_1 - 6) q^{21} + (3 \beta_{3} + 2 \beta_{2}) q^{23} + 5 q^{25} + ( - 6 \beta_{3} - 12 \beta_{2}) q^{27} + ( - 12 \beta_1 - 18) q^{29} + (2 \beta_{3} - 8 \beta_{2}) q^{31} + (12 \beta_1 - 36) q^{33} + ( - 2 \beta_{3} + \beta_{2}) q^{35} + ( - 6 \beta_1 + 20) q^{37} + (6 \beta_{3} + 16 \beta_{2}) q^{39} + (18 \beta_1 + 12) q^{41} + (2 \beta_{3} - 5 \beta_{2}) q^{43} + ( - 9 \beta_1 + 30) q^{45} + ( - 9 \beta_{3} + 4 \beta_{2}) q^{47} + ( - 18 \beta_1 + 7) q^{49} + 18 \beta_{2} q^{51} + (18 \beta_1 + 12) q^{53} + ( - 2 \beta_{3} - 4 \beta_{2}) q^{55} + (24 \beta_1 + 24) q^{57} + 8 \beta_{2} q^{59} + (6 \beta_1 - 64) q^{61} + ( - 3 \beta_{3} + 6 \beta_{2}) q^{63} + (4 \beta_1 - 30) q^{65} + (2 \beta_{3} - 7 \beta_{2}) q^{67} + (30 \beta_1 - 18) q^{69} + ( - 6 \beta_{3} - 16 \beta_{2}) q^{71} + ( - 24 \beta_1 - 38) q^{73} + 5 \beta_{2} q^{75} + ( - 12 \beta_1 - 12) q^{77} - 20 \beta_{2} q^{79} + ( - 54 \beta_1 + 99) q^{81} + (6 \beta_{3} + 15 \beta_{2}) q^{83} + 18 \beta_1 q^{85} + (12 \beta_{3} + 6 \beta_{2}) q^{87} + (24 \beta_1 - 6) q^{89} + (8 \beta_{3} - 6 \beta_{2}) q^{91} + ( - 36 \beta_1 + 156) q^{93} + (8 \beta_{3} - 4 \beta_{2}) q^{95} + ( - 60 \beta_1 - 26) q^{97} + ( - 12 \beta_{3} - 42 \beta_{2}) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 4 q - 36 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 4 q - 36 q^{9} + 16 q^{13} + 72 q^{17} - 24 q^{21} + 20 q^{25} - 72 q^{29} - 144 q^{33} + 80 q^{37} + 48 q^{41} + 120 q^{45} + 28 q^{49} + 48 q^{53} + 96 q^{57} - 256 q^{61} - 120 q^{65} - 72 q^{69} - 152 q^{73} - 48 q^{77} + 396 q^{81} - 24 q^{89} + 624 q^{93} - 104 q^{97}+O(q^{100}) \) Copy content Toggle raw display

Display 100 coefficients 10 coefficients

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{4} - x^{3} + 2x^{2} + x + 1 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( \nu^{3} + 2 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( \nu^{3} + 4\nu + 1 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( -5\nu^{3} + 8\nu^{2} - 12\nu - 1 \) Copy content Toggle raw display

Display \(\nu^j\) in terms of \(\beta_i\)

\(\nu\)\(=\) \( ( \beta_{2} - \beta _1 + 1 ) / 4 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( \beta_{3} + 3\beta_{2} + 2\beta _1 - 6 ) / 8 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( \beta _1 - 2 \) Copy content Toggle raw display

Display \(\beta_i\) in terms of \(\nu^j\)

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/80\mathbb{Z}\right)^\times\).

\(n\) \(17\) \(21\) \(31\)
\(\chi(n)\) \(1\) \(1\) \(-1\)

Embeddings

For each embedding \(\iota_m\) of the coefficient field, the values \(\iota_m(a_n)\) are shown below.

For more information on an embedded modular form you can click on its label.

comment: embeddings in the coefficient field
 
gp: mfembed(f)
 
Label   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
31.1
0.809017 − 1.40126i
−0.309017 − 0.535233i
−0.309017 + 0.535233i
0.809017 + 1.40126i
0 − 5.60503i 0 −2.23607 0 1.32317i 0 −22.4164 0
31.2 0 − 2.14093i 0 2.23607 0 − 9.06914i 0 4.41641 0
31.3 0 2.14093i 0 2.23607 0 9.06914i 0 4.41641 0
31.4 0 5.60503i 0 −2.23607 0 − 1.32317i 0 −22.4164 0
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
4.b odd 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 80.3.b.a ✓ 4
3.b odd 2 1 720.3.e.c 4
4.b odd 2 1 inner 80.3.b.a ✓ 4
5.b even 2 1 400.3.b.g 4
5.c odd 4 2 400.3.h.d 8
8.b even 2 1 320.3.b.a 4
8.d odd 2 1 320.3.b.a 4
12.b even 2 1 720.3.e.c 4
15.d odd 2 1 3600.3.e.bb 4
15.e even 4 2 3600.3.j.k 8
16.e even 4 2 1280.3.g.f 8
16.f odd 4 2 1280.3.g.f 8
20.d odd 2 1 400.3.b.g 4
20.e even 4 2 400.3.h.d 8
24.f even 2 1 2880.3.e.b 4
24.h odd 2 1 2880.3.e.b 4
40.e odd 2 1 1600.3.b.k 4
40.f even 2 1 1600.3.b.k 4
40.i odd 4 2 1600.3.h.p 8
40.k even 4 2 1600.3.h.p 8
60.h even 2 1 3600.3.e.bb 4
60.l odd 4 2 3600.3.j.k 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
80.3.b.a ✓ 4 1.a even 1 1 trivial
80.3.b.a ✓ 4 4.b odd 2 1 inner
320.3.b.a 4 8.b even 2 1
320.3.b.a 4 8.d odd 2 1
400.3.b.g 4 5.b even 2 1
400.3.b.g 4 20.d odd 2 1
400.3.h.d 8 5.c odd 4 2
400.3.h.d 8 20.e even 4 2
720.3.e.c 4 3.b odd 2 1
720.3.e.c 4 12.b even 2 1
1280.3.g.f 8 16.e even 4 2
1280.3.g.f 8 16.f odd 4 2
1600.3.b.k 4 40.e odd 2 1
1600.3.b.k 4 40.f even 2 1
1600.3.h.p 8 40.i odd 4 2
1600.3.h.p 8 40.k even 4 2
2880.3.e.b 4 24.f even 2 1
2880.3.e.b 4 24.h odd 2 1
3600.3.e.bb 4 15.d odd 2 1
3600.3.e.bb 4 60.h even 2 1
3600.3.j.k 8 15.e even 4 2
3600.3.j.k 8 60.l odd 4 2

Hecke kernels

This newform subspace is the entire newspace \(S_{3}^{\mathrm{new}}(80, [\chi])\).

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{4} \) Copy content Toggle raw display
$3$ \( T^{4} + 36T^{2} + 144 \) Copy content Toggle raw display
$5$ \( (T^{2} - 5)^{2} \) Copy content Toggle raw display
$7$ \( T^{4} + 84T^{2} + 144 \) Copy content Toggle raw display
$11$ \( T^{4} + 144T^{2} + 2304 \) Copy content Toggle raw display
$13$ \( (T^{2} - 8 T - 164)^{2} \) Copy content Toggle raw display
$17$ \( (T - 18)^{4} \) Copy content Toggle raw display
$19$ \( T^{4} + 1344 T^{2} + 36864 \) Copy content Toggle raw display
$23$ \( T^{4} + 756 T^{2} + 121104 \) Copy content Toggle raw display
$29$ \( (T^{2} + 36 T - 396)^{2} \) Copy content Toggle raw display
$31$ \( T^{4} + 3024 T^{2} + 2214144 \) Copy content Toggle raw display
$37$ \( (T^{2} - 40 T + 220)^{2} \) Copy content Toggle raw display
$41$ \( (T^{2} - 24 T - 1476)^{2} \) Copy content Toggle raw display
$43$ \( T^{4} + 1476 T^{2} + 535824 \) Copy content Toggle raw display
$47$ \( T^{4} + 8244 T^{2} + 898704 \) Copy content Toggle raw display
$53$ \( (T^{2} - 24 T - 1476)^{2} \) Copy content Toggle raw display
$59$ \( T^{4} + 2304 T^{2} + 589824 \) Copy content Toggle raw display
$61$ \( (T^{2} + 128 T + 3916)^{2} \) Copy content Toggle raw display
$67$ \( T^{4} + 2436 T^{2} + 1468944 \) Copy content Toggle raw display
$71$ \( T^{4} + 9936 T^{2} + 3873024 \) Copy content Toggle raw display
$73$ \( (T^{2} + 76 T - 1436)^{2} \) Copy content Toggle raw display
$79$ \( T^{4} + 14400 T^{2} + 23040000 \) Copy content Toggle raw display
$83$ \( T^{4} + 8964 T^{2} + 4210704 \) Copy content Toggle raw display
$89$ \( (T^{2} + 12 T - 2844)^{2} \) Copy content Toggle raw display
$97$ \( (T^{2} + 52 T - 17324)^{2} \) Copy content Toggle raw display
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